These Streamline gliders are design to work with our Streamline tracks The hook and glider design allows for the curtain to be directly hooked onto the glider and hide the track, or with use of curtains hooks the curtain can be hung below the track. Alternatively, you can hang a curtain to the glider and a loose curtain lining via the use of a curtain hook to hang it below the track. This track is designed for use with light to medium weight curtains They are sold in a pack of 100